US1013896A - Watch. - Google Patents

Description

E. S. PERRY.

WATCH.

APPLICATION I'ILBD AUG. 21, 1910.

1,013,896, Patented Jan. 9, 1912.

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%M 4 ATTORNEY UNITED STATES PATENT OFFICE.

EARLE SLOAN PERRY, OF WALTHAM, MASSACHUSETTS, ASSIGNOR TO KEYSTONE WATCH CASE COMPANY, A CORPORATION OF PENNSYLVANIA.

WATCH.

Specification of Letters Patent.

Patented Jan. 9, 1912.

Application filed August 27, 1910. Serial No. 579,210.

To all whom it may concern:

Be it known that I, EARLE SLOAN PERRY, a citizen of the United States, and a resident of lValtham, in the county of Middlesex and State of Massachusetts, have invented cer' tain new and useful Improvements in \Vatches, whereof the following is a specification, reference being had to the accompanying drawings.

This invention relates to the stem winding and setting mechanism, and particularly to the parts cooperative to hold the clutch in its respective positions.

The principal objects of this invention are to provide the winding and setting mechanism of a watch movement with simple and efficient shifting and locking means, which may be readily assembled, and which is incapable of accidental displacement when locked in either the winding or setting positions, and whose adjustment is limited by means independent of the watch-case; to provide a locking lever with a substantially semi-circular cam, fitted into a spring detent having a recess substantially conforming to the contour of said cam; and cooperative therewith to shift said mechanism, and to retain said lever to lock said mechanism in the winding position, and to prevent the opposite end of said lever engaging the winding gear, and to provide said cam with means cooperative with said detent, to limit its movement when shifted to the setting position of said mechanism, and to prevent said lever engaging the movement casing.

Briefly stated, the form of this invention hereinafter described, provides a watch-case with a longitudinally movable stem, having a squared portion provided with a clutch operatively engageable with either the winding mechanism, or the setting mechanism; a spring operative to normally maintain said clutch in engagement with the winding mechanism; a lever pivoted intermediate of its ends, and having one end engaged with said stem, and its opposite end provided with a notched cam; a spring detent providing a recess operative to engage said cam, and to require a substantial pull upon said stem to dislodge said cam from said recess, and providing a projection operative to engage said notch when thus dislodged.

This invention further includes all of the various novel features of construction and arrangement hereinafter more definitely specified.

In the accompanying drawings, Figure 1 is a fragmentary face view of a watch movement embodying a convenient form of this invention, and showing the parts in the winding position, and Fig. 2 is a fragmentary face view of said watch movement showing the parts in the setting position.

In said figures, 5 represents the watch-case in which is secured the movement comprising in part the dial plate 5 said watchcase being provided with the stem 6 which has a squared region 7, and which is mounted for rotation, and arranged to be shifted longitudinally. Said stem 6 has the winding gear 8 loosely mounted thereon, and is provided wit-h the clutch comprising the crown ratchet 9 having ratchet teeth 10 arranged to engage with ratchet teeth 11 on the winding gear 8, and a crown gear 12 having teeth 13 arranged to mesh with the pinion 14, which is meshed with the hand setting wheel 15. Said clutch is provided with the peripheral groove 18 arranged to receive the free end of the spring member 19 which is secured to said dial plate 5 by the screw 20 and which is arranged to normally maintain said clutch in such position that the teeth 10 of the crown ratchet 9 engage with the teeth 11 of the winding gear 8.

The stem 6 is provided with a groove 22 with which the inturned end 25 of the lever 26 is engaged. Said lever 26 is pivoted at 27 to the dial plate and is provided with the cam 28 normally fitted in the recess 29 of the spring detent 30, which is also secured to the dial plate by the screw 32, and which has its outer free end in slidable engagement with the spring 19. The cam 28 is provided with the notch 34, arranged to engage the projection 35 at the outer edge of the recess 29, when the stem 6 is shifted outwardly to withdraw the cam 28 from the recess 29, which operation effects the shifting of the detent 30, to a position wherein the teeth 13 of the crown wheel 12 engage the teeth of the pinion 14.

It will be obvious from Fig. 2 of the drawing that the outward movement of the stem 6 effects a rocking of the cam lever 26 upon its pivot 27 to withdraw its cam 28 from the cam recess 29, and thereby press the spring detent 30 from its normal position, against the spring 19 to shift the clutch comprising the crown wheels 9 and 12, to the position shown in said figure wherein the teeth 13 of the crown wheel 12 engage with the teeth of the pinion 14, whereby any rotation of the stem 6 effects a movement of the setting wiheels independent of any movement of the winding mechanism which is operated by the winding gear 8. Furthermore it will be obvious that when the cam 28 is seated in the recess 29 as shown in Fig. 1 of the drawings it will require considerable effort to shift the stem 6 from the winding position. Again, it will be understood that by reason of the construction and arrangement of the several parts, all danger of accidentally shifting the mechanism from the winding to the setting position is avoided, as is also any danger of forcing the winding stem 6, when the parts are in the winding position, inwardly, to such an extent as to engage the clutch with the pinion 14:, for the reason that when the parts are in the winding position, any strain imposed upon the winding stem tending to force the same inwardly to bring the clutch into engagement with the setting mechanism will be imposed upon the pivots 27 and 32, tending to separate or dislodge them, which, of course, is impossible. In other words, any inward movement of the long arm of the pendant lever 26 would tend to cause an outward movement of the short arm thereof, and the cam surface of the extreme end thereof fitting closely or nicely into the recess 29 of the spring-detent 30, would be forced to move in a direct line against the screw 32 of said spring-detent 30, which movement, of course, would be prevented by the wall of the recess 29. The advantage of this construction will be recognized when it is remembered that in the majority of instances watch movements are tested and adjusted in the factory prior to being cased. In the operation. of testing and adjusting, it is the custom to insert into the movement the winding stem having the crown thereon, in order that, after proper inspection, the hands of the watch movement may be properly set to a correct reading, and also for the purpose of winding the movement at proper intervals. In the many forms of winding and setting mechanism, it frequently happens that in winding the movement before being cased, a slight push on the winding stem will cause the clutch to engage with the setting wheels, and thereby disturb the proper adjustment of the hands. In my improved mechanism, this danger is avoided, in that by reason of the cam on the pendant lever fitting nicely in a corresponding recess in the spring-detent 30, looks the winding stem when in its winding position against any inward movement beyond a pre-determined point, that is, to an extent where the clutch might come into engagement with the setting wheels. Again, by reason of the formation of the notch 24 in the cam 28, and its engagement with the extension 35, the extent of engagement of the teeth 13 on the crown ratchet 12 with the teeth on the pinion 14, is predetermined. When the winding stem 6 is pulled outwardly to efi'ect a setting adjust ment of the parts, the cam on the lever 28 will cause an inward movement of the free end of the spring-detent 30 until the notch 24: snaps over and rests upon the extension 35, which, as before stated, retains the teeth 13 of the crown ratchet 12 in proper engagement with the teeth on the pinion 14. Any further pull on the winding stem 6 will cause an interlocking or jamming of such teeth, this further pull, however, being resisted by the engagement of the notch with the said extension, and by reason of the change in'the outline of the cam surface at that point wherein the notch is formed. Should, however, this occur, that is, should the teeth 13 too tightly engage the teeth on the pinion 14, when the pull on the stem 6 is released, the tension of the springs 19 and 30 immediately causes a separation of the teeth until the notch 24: engages with the extension 35, in which respective positions the parts will be held or retained, and in which position the teeth above referred to will be in proper free working engagement.

Having thus described this invention, I claim:-

In a winding and setting mechanism, the combination with a rotatable winding stem capable of longitudinal movement, of a clutch mounted on said stem and rotating therewith, a pendant lever engaging at one end with said stem and provided at the other end with a substantially semi-circular notched cam, a spring-detent, the free end of which is provided with a recess conforming in outline to that of said cam, and nicely containing the latter when in the winding adjustment, and a spring, the free end of which engages said clutch for shifting the latter in accordance with the longitudinal movement of the winding stem, the notch in said cam engaging with the wall of the recess formed in said spring-detent when the parts are in the setting position, substantially as described.

In testimony whereof, I have hereunto set my hand this 24th day of August, A. D.

EARLE SLOAN PERRY. Witnesses:

W. C. COOK, W. B. MEHL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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